Norbu Tenzin, Visvanathan C, Basnayake Ben
Department of Environmental Engineering and Management Program, SERD, Asian Institute of Technology, PO Box 4, Klong Luang, Pathum Thani 12120, Thailand.
Waste Manag. 2005;25(10):997-1003. doi: 10.1016/j.wasman.2005.06.006. Epub 2005 Aug 19.
An outdoor pilot-scale study was undertaken to pretreat municipal solid waste by windrow composting. The raw waste was introduced to active composting without any source separation or pulverization. Pretreatment indicators were developed and used as a tool to measure the optimum level of sorting and waste stabilization. The moisture content of the waste dropped from 68% to 61% and the pile attained a thermophilic temperature in one week. It was observed that the C/N ratio, pH profile and temperature gradients were comparable to that of traditional windrow composting. Within one week of active bulk composting, the easily degradable organic matter was consumed and there was a significant reduction in the bulk volume of the mixed waste. The pre-composted wastes were then sorted into four fractions. Compared to the initial untreated waste, the pretreated waste showed greater sorting efficiency and reduced volatile solids. A 1-m(3) cage was used to study pile settlement and volume reduction. The results indicate that pretreatment by bulk composting could reduce by approximately 40% the total mass of waste hauled to landfill sites in developing countries.
开展了一项户外中试规模研究，通过条垛式堆肥对城市固体废物进行预处理。未经任何源头分类或粉碎，将原始废物引入活性堆肥过程。制定了预处理指标，并将其用作衡量最佳分类水平和废物稳定化程度的工具。废物的水分含量从68%降至61%，堆体在一周内达到嗜热温度。据观察，碳氮比、pH值分布和温度梯度与传统条垛式堆肥相当。在活性批量堆肥一周内，易降解有机物被消耗，混合废物的总体积显著减少。然后将预堆肥废物分为四个部分。与最初未经处理的废物相比，预处理后的废物显示出更高的分类效率和更低的挥发性固体含量。使用一个1立方米的笼子研究堆体沉降和体积减少情况。结果表明，通过批量堆肥进行预处理可使发展中国家运往垃圾填埋场的废物总质量减少约40%。
